rogers



(NQ Model.;

J. H. ROGERS.

TELEPHUNY.

Patented Dec. 20,1881.

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UNITED STATES JAMES E. ROGERS, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR F ONF-HALF TO FRANK HUME AND L. G. EINE, OF SAME PLACE.

TELEPHONY.

SPECIFICATION forming' part of Letters P^tent No. 251,292, dated Decenrxoer- 20, 1881;

Application tiled November 9, 18131.

To allwhom it may concern: Y ,Y Y Bc it known thatLJAMns 'Hansis Roenes, acitizen ofthe United States, residingat Washington, in the District of Columbia, havein vented new and useful Improvements in Telegraphy or Telephony, of which 'the following-is a specification.

.Myinvention consists in a method ot secret telephony or teiegraphy in which I use two or ro more circuits in such' a manner that any one tapping but cnc oftl'ie circuits is unable to obtain anything but a-confuscd and unintelligible series of signals. My invention consists in throwing a. message sentfrom any transmitting-instrument th rough two or more circuits alternately in rapid succession. A receiver is placed in each circuit, so that the two receivers together give a continuous series of signals, the one supplying zo what the other'omits. l throw the current conveying the message alternately on each circuit by means of a circuit-breaker, which makes and breaks contact with each circuit in succession. Instead of having two receivers, I may have each circuit actuate the same receiver,in which case the message wouldbe correctly' reproduced by such receiver.

-It if obvious from the above-that any one tapping but one ofthe lines would only receive 3o what would be absolutely unintelligible to him. In the accompanying drawings, which reirresent my invention as adapted to telephony and various modifications thereof, Figure l f is a diagram, in which T is a. transmitter; C, a circuit-breaker revolving between the two contact-springs c and c; It, a receiver; B, a. battery, and g g the ground.` The circuit passes from ground, through battery B, transmitter T, line m, the uninsulated part of the 4o circuit-breaker, through contact-point c, line n, receiver it, to ground again. The circuitbreaker U, on breaking circuit with c, completes it with c', when the circuit passes through n', receiver R, and ground, as before. In this case it is evideutthat a message transmitted at l will alternately pass through lines n and n, yet both will be received at ll and delivered consecutively and sensibly.

i Fig. 2 is a diagram view representing two 5o circuits, n and n', each provided with a battery,

B B', receiver R, and grounded, as in the prelNo model.)

vious case, at g and g. In this instance both circuits pass around the receiver It, and the circuit-breaker C alternately breaks u and makes n', and vice versa, thus throwing any message 55 uttered at'lalternatcly over the two linesinto receiver R. 4

' Fig. 3 is a diagram of two distinct-circuits, similar to the former in every respect, except that each has a circuitbreaker ci' its own, C 6o and C'. `The terminals of these lines are in close proximity to each other, and their circuitbreakers are so ordered that circuit-breaker C makes linen when U breaks n', and vice versa. Consequently' any message uttered in proxiin- 65 ityl to the two transmitters T-and T will be transmittedover their respective lines and the message be jointly reproduced by the twc receivers.

The relation of the mouth-pieces to the di-t- 7o phragmsiu Figs. 2, 3,4 is shown in dotted lines` in those gures.

It will be observed, that although the messagebeingtransmitted is broken up, as it were, and part of itsent over one line and part over the other, the disjointed fragments from the two lines unite harmoniously at the receiver. Thus ,any sound uttered at the transmitter will be sent over the two lines in fragmentary manner, but will be faithfully reproduced at the receiv- 8o ing-instrument.

, From the above it will be noted that any interruption ofone of the lines would be instantly noted by the person receiving the message, but

no benefit could be derived by the person tap- S5 ping the line, as the signals he would hear would'be unintelligible. When two receivers are used it will, o t' course, be ii'npossible to receive intelligible signals over one ot' them but when a receiver is placed to cach ear the dis 9o jointed sounds are carried by theanditoiy nerve so its to unite in the sensorium and produce articulate speech. A third receiver might be einployed on a third circuit and applied to the teeth to act in conjunction with nreeeiver at each ear.

Any two oi' the well-known receivers in gen eral use may be used in my system of transmission; but, asabovc described with reference to Figs. l and 2, I can use-a single receiver ioo for any number of lines by including the magnet of the receiver in. each circuit.

2 l emesse It has heretofore been attempted to trans mit articulate speech by rapidly throwing currenta from opposite poles of a battery upon ainsured--a desideratum long sought, but., soY

far as I am aware, now for the first time accounplished.

0f course the circuits in my system should be connected up in the best and most approved ways for the transmission of articulie speech. For instance, induction-coils may be used, as will be well understood. Y

Cirouit-brealrers otany suitable construction may be employed in connection with my invention.

Haring,Y fully described `luy invention, what I claim is- 1. The iml'novemcnt in the art oft' electric telephony or telegraphy which consistsl in throwing portions ot' the message being transmitted upon one line and other portions upon anothcrline and reproduciugsuch fragment-ary portions in the regular order ottime in which they are transmitted upon receiving apparatus at the common receiving-station otthe lines, whereby the message transmitted is coni tinuously and intelligently reproduced.

2. The improvement in the art ot' electric tclephonyor telegraph),Y which consists in send ing portions ofthe message being transmitted over di'crentlim'as, as set forth, and reproducing suoli fragmentary portions in the regular order of time in which they are transmitted upon receiving apparatus at the common receiving-station of the lines, whereby the message transmitted is continuously and intelligen tly reprod ueed.

3. The combination of a telephonie receiver the magnet of which is included in two or more electric circuits, a transmitting apparatus, and a circuit-breaker, substantially as set forth.

4. The electric circuit herein described for the transmission of telephonie messages, consisti'ng,r of two main lines, in combination with transmitting apparatus common to both lines atsthe transmitting-station and receiving,r aparatus at the receivin mterminals ofsaid lines so arranged that portions ot'- the message beintY transmitted are thrown at the transmitting station upon one line and portions upon the other, such fragmentary' parts of the message beimv united in the receivinfr. a) )aratus and 5 h `the message intelligently reproduced at the receiving-station, as set forth. t-

Theeombination,substantlallyas set forth,

two or more electric circuits, transmitting apparatus at one common terminus. of said lilies, receiving apparatus at the other, and a cireuitbreakcrcommon to the lines at the transmitting-station, whereby a portion of a continuous message being transmitted is thrown upon one line and a portion upon. the other in rapid succession and the message fully and intelligently reproduced at the receiviugstatiou.

1u testimony whereof I have hereunto set my hand in the presence ot' two subscribing,r `ruituesscs.

.Lts n. Roenes.

Witnesses:

.Lures L. No ants,

ALBERT ll. Nounis. 

